三个功能强大的PHP加密解密函数
1 //加密函数
2 function lock_url($txt,$key='www.fyunw.com')
3 {
4 $chars = "ABCDEFGHIJKLMnopQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
5 $nh = rand(0,64);
6 $ch = $chars[$nh];
7 $mdKey = md5($key.$ch 8 substr($mdKey,1)">$nh%8,1)">$nh%8+7 9 $txt = base64_encode($txt 10 $tmp = '' 11 $i=0;$j=0;$k = 0 12 for ($i=0; $i<strlen($txt); $i++) {
13 $k = $k == $mdKey) ? 0 : $k 14 $j = ($nh+strpos($chars,1)">$txt[$i])+ord($mdKey[$k++]))%64 15 $tmp .= $j 16 }
17 return urlencode($ch.$tmp 18 }
19 解密函数
20 function unlock_url( 21 22 urldecode( 23 24 $txt[0 25 26 27 28 29 30 $j=0; 31 32 33 $j = $i])-$nh - $k++]);
34 while ($j<0) $j+=64 35 36 37 base64_decode( 38 39
40
41
42 <?PHP
43 function passport_encrypt($key = 'www.fyunw.com')
44 {
45 srand((double)microtime() * 1000000);
46 $encrypt_key = md5());
47 $ctr = 0;
48 49 for($i = 0;$i < ) {
50 $ctr = $ctr == $encrypt_key) ? 0 : $ctr 51 $encrypt_key[$ctr].($i] ^ $ctr++]);
52 }
53 urlencode(base64_encode(passport_key($tmp,1)">$key)));
54 }
55
56 function passport_decrypt( 57 58 $txt = passport_key(base64_decode($txt)),1)"> 59 60 61 $md5 = $i];
62 $txt[++$md5 63 64 return 65 66
67 function passport_key($encrypt_key 68 69 70 71 72 $i = 0; 73 74 75 76 77 78 ?>
79
80 <?PHP
81
82 $txt = "1" 83 $key = "testkey" 84 $encrypt = passport_encrypt( 85 $decrypt = passport_decrypt($encrypt,1)"> 86
87 echo $encrypt."<br>" 88 $decrypt."<br>" 89 ?>
90
91 改进第一改加密之后的算法
92 //加密函数
93 94 95 $txt = $txt. 96 97 98 99 100 101 102 103 104 105 106 107 108 109 ));
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 trim($tmp),1)">130 }
